Exhalation Valve Remove the drink tube from its holder. Tube stays connected at base of mask. Rock the rubber cover back exposing the blue valve.
{"Image DocumentName": "Exhalation ValveRemove the drink tube from its holder. Tube stays connected at base of mask. Rock the rubber cover back exposing the blue valve.", "Image ImageDescription": "Check for damage or obstructions on or under the valve. Valve will lye flat and turn freely when installed correctly.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}